Window regulator



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' WINDOW REGULATOR Filed Feb.' 1o, 1957 s sheets-Sheet 5 fmRQm Patented Apr. 12, 1938 UNITED STATES iJATENT OFFICE Application February 10, 1937, Serial No. 125,163 In Great Britain February 14, 1936 7 Claims.

This invention relates to window regulators of the kind in which one end of a slidable window is connected with one end of each of a pair of rods pivoted together intermediately of their lengths, the other end of one of said rods being carried by a fixed pivot and the other end of the second rod being guided in a direction substantially at right angles to the direction of movement of the window, the weight of the window being counterbalanced, if necessary, by means of a spring acting upon said rods.

The object of the present invention is to provide an improved construction which, whilst being simple and compact, will permit the window to have a considerable degree of movement in comparison with its width, and may be tted with a minimum of adjustment.

According to the invention, each of the pair of pivoted rods is off-set transversely, and arched/ or slotted laterally, adjacent to its pivotal connection with the other rod in order to enable those ends of the rods which are connected with the window to pass over the other ends of said rods on the same side thereof, when they are rocked about their common pivot. If desired the two rods may be of identical construction, thus enabling them to be made with the same tool. In order to efiect adjustment, that end of one of the rods remote from the window may be pivoted to one end of a link the other end of which is connected with a pivot pin adapted to be. moved by means of a screw substantially in the direction of movement of the window.

One form of the invention, capable of being applied to the window in the door of a motor car will now be described with reference to the accompanying drawings of which Figure 1 is an elevation including fragmentary portions of a window and door; Figure 2 is a plan taken on the line 2-2 of Figure 1; Figure 3 is a side elevation;

Figure 4 is a sectional plan taken on the line 4-4 of Figure l; Figures 5 and 6 are Views of details;

Figure 7 is an elevation to a reduced scale of a motor car door incorporating the device, whilst Figures 8, 9, and 10 are respectively an enlarged elevation, plan and side elevation of an operating handle.

As shown in the drawings two similar rods I I and I2 pressed from sheet metal, are each formed intermediately of their lengths with a laterally arched portion I3 and are off-set transversely as at I4 intermediately of the lengths of the arches I3 to an extent of about twice the thickness of the metal, the rods II and I2 being slotted laterally as at I5 on the inner sides of the arches and on one side of the off-set. The two rods II and I2 are connected together with similar sides opposed to each other by means of a riveted pivot pin I5 adjacent to the off-sets, that half of each rod II and i2 on that side of the pivot I6 remote from the slot I5 being oif-set as at II so that the one end of the one rod will lie substantially in the same plane as the other end of the other rod. The ends I8 and I9 of two halves of the crossed rods I I and I2 which lie substantially in the same plane, are furnished with slide blocks or rollers 2D, 20 for engagement with a guide slot 2| on the lower end of a slidable window 22 Whilst the other ends 23 and 24 of said rods are pivoted, the one 23 as at 25 to the lower portion of one side of a sheet metal frame 26 adapted to be carried by the garnish rail 2l of a motor car door 28, and the other 24 as at 29 to one end of a sheet metal link 3!) the other end of which is carried by a pivot pin 3| slidable along a vertically extending slot 32 formed in the frame 26, the body of said pin being formed with a transversely extending screw-threaded hole engaged by a screw 33 carried by a bent-over portion 34 of the sheet metal frame 26 at the upper edge of the latter. The adjusting screw 33 is restrained against inadvertent movement by means of a spring friction plate or washer 51 (Figures 4 and 5) which fits over the pivot pin and which, if the screw 33 be of steel or iron should preferably be. of copper or a non-ferrous alloy thereof. The upper part of the frame is formed with bentover flanges 35 adapted to rest on the upper edge of the garnish rail 21 and said frame may be slidden, together with the crossed rods I I, I2 and their associated parts, between the garnish rail and the door frame so that the slide rollers 20, 2D can be engaged with their guides on the lower edge of the window, whereupon the flanges 35 may be screwed to the garnish rail 2l and the level of the window 22 be adjusted by means of the screw 33.

The rod I I is furnished intermediately of the pivots I6 and 25 with a transversely projecting pin 36 which engages with a cam. surface on one side of the radius arm 3l of a counterbalancing spring 38, such as described in the'speciiication of our co-pending application for Letters Patent No. 125,164 filed Feb. 10, 1937.

The shape of the cam surface on the arm 31 is so arranged that the counterbalancing effect of the spring 38 is substantially uniform throughout the movement of the window 22 and consequently the window tends to remain stationary at any position to which it may be moved.

If desired, the cam surface may be formed with a series of rounded notches so as to assist in maintaining the window in its adjusted position, particularly if the raising and lowering is to be effected by moving the window itself.

In the form of the invention illustrated, however, the movement of the window is controlled by means of a knob 39 which projects through a slot in the door frame 46 and is carried by a slider 4| movable along a rail 42 secured upon the flanges 34.

The slider 4|, which is shown to an enlarged scale in Figures 8, 9, and 10, is formed with a dependant lug 43 which is pivotally connected by means of a link 44 with one arm 45 of a bellcrank lever 45, 45 pivoted as at 4l to the lower end of the frame 25, the other arm 46 of the bellcrank lever being pivotally connected by means of a link 48 with the pin 35.

The knob 39 is secured to the lower end of an arm 49 depending from a locking plate 59 which rests upon the slider 4| and is constrained thereto by means of a leaf-spring 5| secured to said slider and acting upon an upwardly projecting lug 52 formed midway along the plate 5B. A pin 5S projecting upwardly from the slider 4| through a clearance hole in the plate 59 prevents movement of the latter along the slider 4| whilst inturned lugs 54, 54 are adapted to engage with the underside of the rail 42 when said plate is raised or tilted.

Midway along the length of the locking plate 56 is formed a locking peg 55 which, when the plate 59 is normally at rest engages with one of a series of notches 56 formed on the adjacent edge of the rail 42 and thereby restrains movement of the slider 4| along the rail 42 in both directions.

Movement of the knob 39 in either direction causes the locking plate 50 to tilt against the action of the spring 5| whereupon the peg 55 is released from engagement with a notch 59 and allows the slider 4| to move.

As soon as the knob 39 is released the peg 55 engages with another notch 5B and locks the slider 4| to the rail 42.

It will be understood, therefore, that by a simple sliding movement of the knob 39 the window 22 may readily be raised or lowered with very small effort and be maintained in any one of a series of positions against the effects of vibration or attempts to lower the window otherwise than by means of said knob.

Other devices for transmitting motion from a knob such as 39 to the crossed rods and |2 may be employed in lieu of the link and lever mechanism described above as also may other means for locking the window in its adjusted positions.

In a modified arrangement, the rod may be formed, or provided, with an extension adjacent to the pivot 25 instead of being connected with the link 43 and its associated operating mechanism, said extension having a notched arcuate upper portion adapted to be engaged by a springpressed detent which may be formed at or near one end of a rocking arm which may have a cam surface for engagement with the lower end of a manually operated locking-lever, the spring which acts at its one end on said rocking arm preferably also acting at its other end upon the outer end of a second rocking arm disposed on the opposite side of the locking-lever, fulcrum and havingk on its upper surface a hump over which a transverse pin on said locking-lever may ride. The two rocking arms and the locking-lever may be carried by a plate pivoted at its lower end to a frame of the device and formed at its upper end with serrations bent slightly out of the plane of the plate so as to be adapted to engage with corresponding serrations formed in an arcuate slot in the frame in order that the angular position of said plate and consequently the position of the detent relatively to its notches, may be adjusted so as to enable the window to be locked when it is in its fully closed position as well as at intermediate positions.

It is to be observed that almost the whole of the device is capable of being made from sheet metal by pressing or stamping and that the majority of the pivotal and other connections may be simple rivets, friction at the pivotal connections being reduced by the insertion between the moving parts of spring washers of cop-per or the like such as are shown as 53 in Figure 6. Consequently the costs of material and labour both as regards manufacture and installation may be very small, whilst at the same time the device may readily and inexpensively be adapted and adjusted to suit various types of windows.

I claim:

1. A window regulator for car doors and the like comprising a sliding sash having a longitudinal trackway therealong, a pair of crossed arms slidably pivoted at one end in said trackway, said arms being pivoted together intermediate of their lengths, an operating lever attached to one arm, one of said arms being pivoted at its other end to the door frame, a link pivoted to the other end of the other arm for suspending the same in any one of a plurality of selected positions, and extensible means for attaching said link to said door frame whereby selectively to alter the pitch of the sash.

2. A window regulator as claimed in claim 1, said extensible means comprising a screw in threaded engagement with said link, and in nonthreaded engagement with said door frame.

3. A window regulator as set forth in claim 1, said door including a casing, said arms and link being inside said casing, said extensible means having an operating part exposed outside said casing whereby to alter the pitch of said sash from outside the casing.

4. A window regulator as set forth in claim 1, said crossed arms having offset intermediate portions, said portions being oifset both transversely and laterally to permit said arms to be inverted when they are rocked around their common pivot.

5. A window regulator as set forth in claim 1, said means being movable in substantially the direction of the movement of the window, whereby said arms exert equal force on said sash when moved by said operating lever.

6. A window regulator for car doors and the like comprising a sliding sash having longitudinal trackways therealong, a pair of cross arms slidably pivoted at one end in said trackway, means forpivotally attaching the other end of said pair of arms to the door frame, and an operating lever to one of said arms, said arms being pivoted together intermediate of their length, and having substantially offset portions adjacent the common pivot whereby the said arms may be inverted, the said arms being substantially identical.

7. A window regulator as set forth in claim 6, said portion adjacent the common pivot being offset both transversely and laterally.

ERNEST PAGE. 

